Land Monitor Salinity Extent For South West Australia 1990

1990 salinity mapping for South West Western Australia, vectorized from a 25-meter pixel raster. The dataset identifies severely salt-affected land using satellite imagery, topographic data, and ground information, with post-processing to remove urban areas. It was created by the Department of Primary Industries and Regional Development.

Use Cases

• Analyze the spatial distribution of severely salt-affected land from the 1990 vectorized mapping.
• Compare this 1990 salinity extent with later estimates to detect expansions or improvements in land condition.
• Integrate the vectorized salinity data with ancillary GIS datasets for regional environmental modeling.
• Use the urban-area-removed polygons for land use planning and agricultural impact assessments.

Strengths

• Derived from a multi-source methodology using satellite imagery, topographic data, and ground information.
• Original raster data provided 25-meter pixel resolution for detailed spatial analysis.
• Post-processed to remove urban areas, improving focus on agricultural and natural landscapes.

Limitations

• Represents a single snapshot from 1990; changes may have occurred without interim updates.
• Focus is limited to the severe salinity class, excluding moderate or potential salinity areas.
• Vector conversion and post-processing may introduce generalization errors from the original raster.

Provenance

Source

Department of Primary Industries and Regional Development Geographic Information Services.

Collection Method

Satellite imagery (Landsat TM), high-resolution topographic data, ground information, and ancillary GIS data processed with a spatial-temporal methodology.

Time Range

1990.

Freshness

Methodology updated in 2022, but the underlying spatial data reflects the 1990 period.

Geography

South West of Western Australia.